Diabolical | Mean of diabolical in English Dictionary
/ˌdajəˈbɑːlɪkəl/
- extremely evil
- a diabolical [=fiendish, devilish] enemy
- a diabolical plot to overthrow the government
- very unpleasant, bad, or annoying
- The party was awful: the guests were boring and the food was diabolical. [=awful, terrible]